I'm going to kill you, Harry Potter. I'm going to destroy you. After tonight, no one will ever again question my powers. After tonight, if they speak of your name, they'll speak only of how you begged for death, and I, being a merciful lord... obliged.

Pick up your wand, Potter! You've been taught how to duel, I presume. First, we bow to each other. Come now, Harry. The niceties must be observed. Dumbledore wouldn't want you to forget your manners, would he? I said, bow!